taliban gunmen executed young couple trying elope rural afghanistan local police chief told cnn tuesday woman forced parents engaged man did like said police chief gabar furdali decided leave home man local taliban commanders set punish said police officer village man khe kash rud district nimruz province remote southwestern province borders iran pakistan taliban gathered residents kash rud watch execution man abdul aziz woman named shot death police officer said did say killings took place nato troops patrol country limited presence particular area spokesman told cnn killings area responsibility aware reports said spokesman nato mission declined named line policy tradition honor killings region long predates taliban said barnett rubin afghanistan expert new york university journalist tawab qurayshi contributed report afghanistan taliban nato